LMH6518_15 Datasheet, PDF (10/41 Pages) Texas Instruments – LMH6518 900 MHz, Digitally Controlled, Variable Gain Amplifier

LMH6518
SNOSB21C – MAY 2008 – REVISED JULY 2013
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Typical Performance Characteristics (continued)
Unless otherwise specified, Input CM = 2.5V, V_CM = 1.2V, V_{CM AUX} = 1.2V, Single-ended input drive, V_CC = 5V, V_DD = 3.3V, R_L
= 100Ω differential (both Main & Auxiliary Outputs), V_OUT = 0.7 V_PP differential (both Main and Auxiliary Outputs), Main output
specification (Auxiliary is labeled “Auxiliary”), full bandwidth setting, gain = 18.8 dB (Preamp LG, 0 dB ladder attenuation), Full
Power setting ⁽¹⁾.
Phase
vs.
Gain
0
Full BW
-50
Response Over Temperature
2
25°C, HG _{85°C, HG}
1
25°C, LG
-100
-150
0
-1
85°C, LG
-40°C, HG
-2
-40°C, LG
-200
-250
-300
0
LG, 0 dB
HG, 20 dB
LG, 20 dB
HG, 0 dB
200 400 600 800 1000
FREQUENCY (MHz)
Figure 8.
-3
-4
-5
10 dB Ladder
-6
10
100
1G
FREQUENCY (MHz)
Figure 9.
Auxiliary Response Over Temperature
2
85°C, HG
1
25°C, HG
85°C, LG
0
25°C, LG
-1
-40°C, HG
-2
-40°C, LG
-3
-4
-5
10 dB Ladder
-6
10
100
1G
FREQUENCY (MHz)
Figure 10.
Main
vs.
Auxiliary Response
2
Phase
1
50
Aux, HG Main, HG
Main, LG
0
0
Gain
-1
Aux, LG
-50
-100
-2
Aux, HG
-150
Main, LG
-3
-200
-4
-250
-5
10 dB Ladder
-6
10
100
-300
-350
1G
FREQUENCY (MHz)
Figure 11.
Response
vs.
Gain
0.5
All Gains
20 MHz Filter
0
-0.5
-1
-1.5
-2
-2.5
-3
0 2 4 6 8 10 12 14 16 18 20
FREQUENCY (MHz)
Figure 12.
Phase
vs.
Gain
20
20 MHz Filter
-30
-80
-130
LG, 0 dB, 10 dB, 20 dB
HG, 0 dB, 10 dB, 20 dB
-180
0
50 100 150 200 250 300
FREQUENCY (MHz)
Figure 13.
10
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